SS7 ANSI-41 to SIP based call signaling conversion gateway for wireless VoIP E911
US8228897B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 2006 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Nov 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An SS7-based call protocol conversion gateway that translates between circuit-switched SS7 protocols and session initiation protocol (SIP) oriented protocol, allowing an E911 call initiated over a switched network to be routed by a VoIP network. The SS7-based call protocol conversion gateway provides a PSAP with MSAG quality (street address) information about a VoIP dual mode phone user without the need for a wireless carrier to invest in building out an entire VoIP core. Thus, wireless carriers may continue signaling the way they are today, i.e., using the J-STD-036 standard for CDMA and GSM in North America, yet see benefits of a VoIP network core, i.e., provision of MSAG quality location data to a PSAP.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.